<!DOCTYPE HTML>
<html lang="en">
	<head>
		<title>three.js webgl - lensflares</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<style type="text/css">
			body {
				background:#000;
				padding:0;
				margin:0;
				font-weight: bold;
				overflow:hidden;
			}
			#info {
				position: absolute;
				top: 10px; width: 100%;
				color: #ffffff;
				padding: 5px;
				font-family: Monospace;
				font-size: 13px;
				text-align: center;
				z-index:100;
			}

			a {
				color: orange;
				text-decoration: none;
			}

			a:hover {
				color: #0080ff;
			}

		</style>
	</head>

	<body>
		<div id="info">
			<a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> - lensflares -
			textures from <a href="http://ro.me">ro.me</a> - fly with WASD/RF/QE + mouse
		</div>

		<script src="../build/Three.js"></script>

		<script src="js/Stats.js"></script>

		<script>

			var container, stats;

			var camera, scene, renderer;

			var clock = new THREE.Clock();

			var composer;

			init();
			animate();

			function init() {

				container = document.createElement( 'div' );
				document.body.appendChild( container );

				// camera

				camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 15000 );
				camera.position.z = 250;

				controls = new THREE.FlyControls( camera );

				controls.movementSpeed = 2500;
				controls.domElement = container;
				controls.rollSpeed = Math.PI / 6;
				controls.autoForward = false;
				controls.dragToLook = false

				// scene

				scene = new THREE.Scene();
				scene.add( camera );

				scene.fog = new THREE.Fog( 0x000000, 3500, 15000 );
				scene.fog.color.setHSV( 0.51, 0.6, 0.025 );

				// world

				var s = 250;

				var cube = new THREE.CubeGeometry( s, s, s );
				var material = new THREE.MeshPhongMaterial( { ambient: 0x333333, color: 0xffffff, specular: 0xffffff, shininess: 50, perPixel: true } );


				for ( var i = 0; i < 3000; i ++ ) {

					var mesh = new THREE.Mesh( cube, material );

					mesh.position.x = 8000 * ( 2.0 * Math.random() - 1.0 );
					mesh.position.y = 8000 * ( 2.0 * Math.random() - 1.0 );
					mesh.position.z = 8000 * ( 2.0 * Math.random() - 1.0 );

					mesh.rotation.x = Math.random() * Math.PI;
					mesh.rotation.y = Math.random() * Math.PI;
					mesh.rotation.z = Math.random() * Math.PI;

					mesh.matrixAutoUpdate = false;
					mesh.updateMatrix();

					scene.add( mesh );

				}


				// lights

				var ambient = new THREE.AmbientLight( 0xffffff );
				ambient.color.setHSV( 0.1, 0.5, 0.3 );
				scene.add( ambient );


				var dirLight = new THREE.DirectionalLight( 0xffffff, 0.125 );
				dirLight.position.set( 0, -1, 0 ).normalize();
				scene.add( dirLight );

				dirLight.color.setHSV( 0.1, 0.725, 0.9 );

				// lens flares

				var textureFlare0 = THREE.ImageUtils.loadTexture( "textures/lensflare/lensflare0.png" );
				var textureFlare2 = THREE.ImageUtils.loadTexture( "textures/lensflare/lensflare2.png" );
				var textureFlare3 = THREE.ImageUtils.loadTexture( "textures/lensflare/lensflare3.png" );

				addLight( 0.55, 0.825, 0.99, 5000, 0, -1000 );
				addLight( 0.08, 0.825, 0.99,    0, 0, -1000 );
				addLight( 0.995, 0.025, 0.99, 5000, 5000, -1000 );

				function addLight( h, s, v, x, y, z ) {

					var light = new THREE.PointLight( 0xffffff, 1.5, 4500 );
					light.position.set( x, y, z );
					scene.add( light );

					light.color.setHSV( h, s, v );

					var flareColor = new THREE.Color( 0xffffff );
					flareColor.copy( light.color );
					THREE.ColorUtils.adjustHSV( flareColor, 0, -0.5, 0.5 );

					var lensFlare = new THREE.LensFlare( textureFlare0, 700, 0.0, THREE.AdditiveBlending, flareColor );

					lensFlare.add( textureFlare2, 512, 0.0, THREE.AdditiveBlending );
					lensFlare.add( textureFlare2, 512, 0.0, THREE.AdditiveBlending );
					lensFlare.add( textureFlare2, 512, 0.0, THREE.AdditiveBlending );

					lensFlare.add( textureFlare3, 60, 0.6, THREE.AdditiveBlending );
					lensFlare.add( textureFlare3, 70, 0.7, THREE.AdditiveBlending );
					lensFlare.add( textureFlare3, 120, 0.9, THREE.AdditiveBlending );
					lensFlare.add( textureFlare3, 70, 1.0, THREE.AdditiveBlending );

					lensFlare.customUpdateCallback = lensFlareUpdateCallback;
					lensFlare.position = light.position;

					scene.add( lensFlare );

				}

				// renderer

				renderer = new THREE.WebGLRenderer( { antialias: true, maxLights: 8, alpha: true } );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setClearColor( scene.fog.color, 1 );

				container.appendChild( renderer.domElement );

				//

				renderer.gammaInput = true;
				renderer.gammaOutput = true;
				renderer.physicallyBasedShading = true;

				// stats

				stats = new Stats();
				stats.domElement.style.position = 'absolute';
				stats.domElement.style.top = '0px';
				stats.domElement.style.zIndex = 100;
				container.appendChild( stats.domElement );

				stats.domElement.children[ 0 ].children[ 0 ].style.color = "#aaa";
				stats.domElement.children[ 0 ].style.background = "transparent";
				stats.domElement.children[ 0 ].children[ 1 ].style.display = "none";

				// events

				window.addEventListener( 'resize', onWindowResize, false );

			}

			//

			 function lensFlareUpdateCallback( object ) {

				var f, fl = object.lensFlares.length;
				var flare;
				var vecX = -object.positionScreen.x * 2;
				var vecY = -object.positionScreen.y * 2;


				for( f = 0; f < fl; f++ ) {

					   flare = object.lensFlares[ f ];

					   flare.x = object.positionScreen.x + vecX * flare.distance;
					   flare.y = object.positionScreen.y + vecY * flare.distance;

					   flare.rotation = 0;

				}

				object.lensFlares[ 2 ].y += 0.025;
				object.lensFlares[ 3 ].rotation = object.positionScreen.x * 0.5 + 45 * Math.PI / 180;

			}

			//

			function onWindowResize( event ) {

				renderer.setSize( window.innerWidth, window.innerHeight );

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				var delta = clock.getDelta();

				controls.update( delta );
				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>
